#app {
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
    -webkit-font-smoothing: antialiased; //抗锯齿
    -moz-osx-font-smoothing: grayscale;//抗锯齿
    text-align: center;
    color: #2c3e50;
    margin-top: 60px;
  }
  
  html, head, body, div, p, span, ul, ol, li, form, input, select, h1, h2, h3, h4, h5, h6, a {
    margin: 0;
    padding: 0;
  }
  
  h1, h2 {
    font-weight: normal;
  }
  
  ul, ol, li {
    list-style-type: none;
  }
  
  a {
    color: #42b983;
  }
  
  .whole_background {
    background-image: url("https://assets.2dfire.com/frontend/a916cb8963aecc69571b50ec2cf8ccf4.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
  }
  
  .clearfix:before, .clearfix:after {
    content: "";
    display: table;
  }
  
  .clearfix:after {
    clear: both;
  }
  
  .clearfix {
    clear: both;
    *zoom: 1;
  }
  